Introduction to Google APIs
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Sivasubramaniam Arunachalam will give a presentation on Google APIs and Google App Engine. The presentation will introduce APIs and REST, describe what Google APIs are available, and include a demonstration. It will cover what an API is, introduce REST and its components and methods like GET, PUT, POST and DELETE. It will also discuss why REST is used, Google data APIs and authorization with OAuth 2.0.
Introduction to Google APIs
- 1. Introduction to Google APIs August 25, 2012 Sivasubramaniam Arunachalam http://barcampbangalore.org/bcb/bcb12/google-apis-and-google-app-engine-introduction-demo
- 3. Agenda • What is an API? • REST - Introduction • Google APIs • Demo
- 4. API “Specification intended to be used as an interface by software components to communicate with each other”
- 5. Language Dependent APIs • Python (pydoc) • Ruby (ri) • Perl (perldoc) • Java (javadoc) • Unix (man)
- 6. Language Independent APIs • RPCs • CORBA • Web Services
- 7. Evolution • Web 2.0 & 3.0 • Web Services "A software system designed to support interoperable machine-to-machine interaction over a network" (W3C)
- 8. Web APIs • HTTP, HTTP & HTTP • XML • JSON • Mash-ups • Enterprise • Consumer • Data
- 9. Web Services • SOAP • Heavy Weight • Suitable for Enterprises • REST • Light Weight • Suitable for Web APIs
- 10. Why REST? • Ease of Development & Deployment • Serves the actual purpose of HTTP • Cache Proxies • Human readable results • Flexile Formats • Better Performance • Better Browser Support • Social Media Authentication
- 11. REST - Introduction • Architectural Style • Uses only HTTP • Stateless • Clean URL (Slugs & SEO)
- 12. REST - Components • Origin Servers • Gateways • Proxies • Clients • Client (Requested By) • Server (Provided By) • Resource (What is being exchanged) • Representation
- 13. REST - Methods • GET • PUT • POST • DELETE http://provider.com/resources/ http://provider.com/resources/entry05
- 14. REST – Methods (GET) http://provider.com/resources/ http://provider.com/resources/entry05 •List •Retrieve
- 15. REST – Methods (PUT & POST) http://provider.com/resources/ http://provider.com/resources/entry05 •Replace •Replace/Create
- 16. REST – Methods (DELETE) http://provider.com/resources/ http://provider.com/resources/entry05 •Delete the List •Delete the Entry
- 17. PUT vs POST • Explicit URL Name in request (PUT) • Idempotent (PUT) • No Duplicate • PUT - Same URL for (Create/Update)
- 18. PUT • /resources/<existing_resource> (update) • /resources/<new_resource> (Create)
- 19. POST • /resources (Create and URL will be returned) • /resources/<existing_resource> (Update) • /resources/<new_resource> (Error)
- 20. OAuth 2.0 Flow http://tutorials.jenkov.com/oauth2/overview.html
- 21. OAuth 2.0 Flow (Contd…) http://www.ibm.com/developerworks/library/x-androidfacebookapi/index.html
- 22. Google APIs • Data APIs (Demo in few minutes) • Ajax APIs • JS & HTML • Rich dynamic web sites • Ads APIs • Adsense • Adwords • (SOAP Based)
- 23. Google Data APIs • 46 Apps • Tools • API Explorer • API Console • OAuth 2.0 Playground
- 24. Demo • Discovery • Books • URL Shorter • Tasks • Google + • Others
- 25. Questions (?)
- 26. Thank You! siva@sivaa.in @sivaa_in
- 27. References • http://en.wikipedia.org/wiki/Application_programming_interface • http://en.wikipedia.org/wiki/Representational_state_transfer • http://en.wikipedia.org/wiki/Google_Code • http://googlecode.blogspot.in/2009/08/well-earned-retirement-for-soap-search.html • http://stackoverflow.com/questions/6166746/why-use-soap-for-webservices • http://stackoverflow.com/questions/630453/put-vs-post-in-rest • http://stackoverflow.com/questions/3487991/why-does-oauth-v2-have-both-access-and-refresh-tokens
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